FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/include/sys/zfs_ioctl_impl.h

     /*
      * CDDL HEADER START
      *
      * The contents of this file are subject to the terms of the
      * Common Development and Distribution License (the "License").
      * You may not use this file except in compliance with the License.
      *
      * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      * or https://opensource.org/licenses/CDDL-1.0.
     * See the License for the specific language governing permissions
     * and limitations under the License.
     *
     * When distributing Covered Code, include this CDDL HEADER in each
     * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     * If applicable, add the following below this CDDL HEADER, with the
     * fields enclosed by brackets "[]" replaced with your own identifying
     * information: Portions Copyright [yyyy] [name of copyright owner]
     *
     * CDDL HEADER END
     */
    
    
    #ifndef _ZFS_IOCTL_IMPL_H_
    #define _ZFS_IOCTL_IMPL_H_
    
    extern kmutex_t zfsdev_state_lock;
    extern uint64_t zfs_max_nvlist_src_size;
    
    typedef int zfs_ioc_legacy_func_t(zfs_cmd_t *);
    typedef int zfs_ioc_func_t(const char *, nvlist_t *, nvlist_t *);
    typedef int zfs_secpolicy_func_t(zfs_cmd_t *, nvlist_t *, cred_t *);
    
    typedef enum {
            POOL_CHECK_NONE         = 1 << 0,
            POOL_CHECK_SUSPENDED    = 1 << 1,
            POOL_CHECK_READONLY     = 1 << 2,
    } zfs_ioc_poolcheck_t;
    
    typedef enum {
            NO_NAME,
            POOL_NAME,
            DATASET_NAME,
            ENTITY_NAME
    } zfs_ioc_namecheck_t;
    
    /*
     * IOC Keys are used to document and validate user->kernel interface inputs.
     * See zfs_keys_recv_new for an example declaration. Any key name that is not
     * listed will be rejected as input.
     *
     * The keyname 'optional' is always allowed, and must be an nvlist if present.
     * Arguments which older kernels can safely ignore can be placed under the
     * "optional" key.
     *
     * When adding new keys to an existing ioc for new functionality, consider:
     *      - adding an entry into zfs_sysfs.c zfs_features[] list
     *      - updating the libzfs_input_check.c test utility
     *
     * Note: in the ZK_WILDCARDLIST case, the name serves as documentation
     * for the expected name (bookmark, snapshot, property, etc) but there
     * is no validation in the preflight zfs_check_input_nvpairs() check.
     */
    typedef enum {
            ZK_OPTIONAL = 1 << 0,           /* pair is optional */
            ZK_WILDCARDLIST = 1 << 1,       /* one or more unspecified key names */
    } ioc_key_flag_t;
    
    typedef struct zfs_ioc_key {
            const char      *zkey_name;
            data_type_t     zkey_type;
            ioc_key_flag_t  zkey_flags;
    } zfs_ioc_key_t;
    
    int zfs_secpolicy_config(zfs_cmd_t *, nvlist_t *, cred_t *);
    
    void zfs_ioctl_register_dataset_nolog(zfs_ioc_t, zfs_ioc_legacy_func_t *,
        zfs_secpolicy_func_t *, zfs_ioc_poolcheck_t);
    
    void zfs_ioctl_register(const char *, zfs_ioc_t, zfs_ioc_func_t *,
        zfs_secpolicy_func_t *, zfs_ioc_namecheck_t, zfs_ioc_poolcheck_t,
        boolean_t, boolean_t, const zfs_ioc_key_t *, size_t);
    
    uint64_t zfs_max_nvlist_src_size_os(void);
    void zfs_ioctl_update_mount_cache(const char *dsname);
    void zfs_ioctl_init_os(void);
    
    boolean_t zfs_vfs_held(zfsvfs_t *);
    int zfs_vfs_ref(zfsvfs_t **);
    void zfs_vfs_rele(zfsvfs_t *);
    
    long zfsdev_ioctl_common(uint_t, zfs_cmd_t *, int);
    int zfsdev_attach(void);
    void zfsdev_detach(void);
    void zfsdev_private_set_state(void *, zfsdev_state_t *);
    zfsdev_state_t *zfsdev_private_get_state(void *);
    int zfsdev_state_init(void *);
    void zfsdev_state_destroy(void *);
    int zfs_kmod_init(void);
    void zfs_kmod_fini(void);
   
   #endif

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